Package adapter



June 30, 1953 E. w. PAEPLOW ETAI, 2,643,330

PACKAGE ADAPTER Filed June 7; 1949 2 Sheets-Sheet l' FIGI. 27

INVENTORS EARL WILL/AM PAEPLOW and MESSOUD KIACHIF BY W ATTORNEYPatented June 30, 1953 UNITED STATES TENT OFFICE 2,643,830 PACKAGEADAPTER Earl William Paeplow, Chester, and Messoud Kiachif, Richmond,Va., assignors to E. I. du Pont de Nemours & Company, Wilmington, Del.,a. corporation of Delaware Application June 7, 1949, Serial No. 97,527

1 Claim. (01. 242=--124) spindle adapter for a cylindrical tube of yarnI which is to be twisted into crepe yarn.

In U. S. 2,119,963 to Ramsdell, filed June 21,

Q 1935, and issued June 7, 1938, there is described a process forconverting a tubular package of viscose rayon yarn on the throwingmachine into crepe yarn or other highly twisted yarn. This package isdesigned to carry /4 to lb. Of yarn which while twisting to 40turns/inch or more will last for several days on the spindle before itruns out. As pointed out in this patent, such a process has very decidedeconomic advantages and more recently it has been found that stillgreater economic advantages result by the present invention whichaffords an increase in the yarn package to 1 lb. or more in size.

In view of the time it takes to twist the yarn from a 1 lb. package,which may be a matter of seven or eight days of continuous operation,the top and bottom ends of the package become badly soiled, making thecrepe fabric woven from this yarn unsuited for dyeing in pastel shadesor unfit for use aswhite goods. The gray goods produced from this yarnare very noticeably streaked with dirt which is twisted into yarn andcannot be removed by boil-off or bleaching. In spite of the very decidedeconomic advantages inherent in this process it appeared that in theabsence of some solution to this soiling problem the entire processwould have to be abandoned.

It is, therefore, an object of this invention to provide an improvedpackage adapter. A further object is the provision of means forprotecting the yarn against soiling during the period it remains on thethrowing spindle. Other objects will be apparent from the descriptionthat follows.

The objects of the invention are accomplished by the use of an uptwisterpackage assembly having a support for the yarn package and removablefianges substantially covering the ends of the yarn package. In oneembodiment, the assembly has an adapter base and adapter cap for thethrowing spindle for supporting the core on which the yarn is wound. Thebase and cap are provided with end flanges which are suitably designedto fit snugly over the ends of the package or to touch substantially theyarn and thus prevent soiling of the yarn while it remains in thepackage on the twister spindle. The cap and the base are held on thecore in an inter-docking fashion and the fiyer is interlocked on thecap. The drop wire on the fiyer preferably has a double bend in it torestrict it from moving outward during rotation of the assembly. I

The invention will be more readily understoo by reference to thedrawings in which:

Figure l is a plan view;

Figure 2 is a side elevation showing the assembled unit;

Figure 3 is a plan view of the base;

Figure 4 is a bottom view of the base;

Figure 5 is a sectional view taken on line 5--5 of Figure 2 showing therelationship between the fiyer, cap and core;

Figure 6 is a sectional view taken on line 6-6 of Figure 1;

Figure '7 is a sectional view taken on line 1-1 of Figure 2;

Figure 8 is an elevation of the cap;

Figure 9 is a plan view of the core and.

Figure 10 is an elevation of the base.

Referring to Figure 2, the yarn package consists of a rigid,light-weight core I of aluminum,

magnesium or alloy of light metals or of a molded or extruded plastic,such as ethyl cellulose or other cellulose derivative, or of cardboardor fiber, or the like and yarn 2 wound thereon. Inserted in the loweropening of the cylindrical core I is an adapter base 3 which fitstightly on spindle 4 which is driven by any conventional means notshown. Inserted in the top of core I is cap 5 and inserted in the cap isfiyer 6. The relationship of the three elements, base, cap and fiyer isshown in the plan view in Figure 1.

The base 3 has lands '1' which form grooves 8 into which lands 9contained in the core I fit. These lands 9 on the inside of core I runlongitudinally the full length of the core and there are, generally ,aplurality of them. It is preferred to extend a plurality of lands 7 uppart way on the cylinder section it of base 3. The ribs ll so formed fitsnugly on the inside surface of core I and thereby add stability. Whilethree lands 9 and three ribs II are shown, the number maybe more or lessthan. that. The lands, grooves and ribs of base 3 may be seen in Figures3, '7 and 10 and the lands 9 of core I may be seenin Figure 9.

The fitting of the lands 9 in grooves 8 serves as a lock and drivingmeans for core I. Figure 4 shows how the bottom of base 3 is recessed atI 3. Usually only recess [3 is needed to receive the clutch part ofspindle 4 (not shown) and thereby act as the driving. key-way. Recessesl2 and I4 are used to. lighten the member. The ro- Wires I9 and 20.

tation of spindle 4 by a motor or belt driven by motor causes theadapter base 3 to rotate and this in turn causes the core I to rotate.The parts rotate as a unit at the same speed.

Inserted at the top opening of core I is the adapter-cap 5. This fitssnugly against the inside walls of core I in a manner similar to that ofbase 3. Adapter cap is fitted with lands l5 forming grooves I6 and aplurality of the lands [5 are extended up on cylinder section [1 to formstabilizing ribs [8. The construction is shown in Figure 8. The fittingof cap 5 and base 3 in core I is shown in Figure 6. The cooperation ofthe lands and grooves holds the adapter cap securely in place.

In accordance with the usual practice, fitted into the adapter cap 5 isthe flyer 6 carrying Both the adapter cap and flyer fit on the spindle 4and the flyer 6 fits into the cap by means shown in Figures 5 and 6.There is free motion between the flyer and spindle and between the flyerand cap. As shown in Figure 6 a ring 2| is inserted or made an integralpart of cap 5 and this ring has an overhanging edge 22. In Figure 5 itcan be seen that flyer 6 has on its lower part of its cylindricalsection 23 a protruding member 24. The fittin of spindle i in thecylindrical section 23 and the cooperation between the edge 22 andprotuberance 24 prevents the flyer 6 from flying off during the highspeed rotation of the package. The flyer 6 is inserted in cap 5 bytilting the flyer so that protuberance 24 slips under edge 22 and afterthe flt is made flyer '5 falls into place on the top of cap 5 upon whichit rotates. The wires 19 and 28 have the usual eyes 25 through which theyarn is passed during processing.

The eye on drop wire [9 must be substantially .below the junction pointbetween cap 5 and the end of the yarn package. This location isnecessary in order to prevent yarn breakage due to wedging between thecap and package, for due to the high speed of rotation the wire will bethrown out and up by centrifugal force. The drop wire l9 preferably hasa double bend in it, one at 2B and the other at 29. While a single rightend bend is operable, the double bend. arrangement has advantages inthat more clearance is obtained and the drop wire is not forcedoutwardly by the centrifugal force as much as it is in the single bendarrangement. In a preferred construction of flyer 6 both the members 30in which the drop wires l9 and 20 are inserted and the base 31 are madelonger than shown in Figure 1, in order to reduce the horizontal lengthof the wire and reduce its tendency to be bent upwardly by centrifugalforce. The extra length of 39 and 3| and the double bend feature of dropwire is permit operation under yarn tensions about 20% lower thanpossible with the usual flyer. A mere increase in the length of asingle-bend drop wire is unsatisfactory because the centrifugal forcestraightens the wire out to a point where the greater drop isineffective. The use of heavy wires leads to undesirable highertensions. The double bend arrangement and the added support provided bythe longer members 30 and. 3| solve the problem and involve none of theabove disadvantages. The extra length of members 39 and 3! also providesfor lower tensions.

The lower portion of the base 3 has a flange 26.upon which the yarn 2rests. A similar flange z'l'isprovidedat the top by adapter cap 5. Thetop end of'the yarn package 2 is in contact with this flange. Asquare-ended yarn package is provided for and the surfaces at both endsare protected by flanges, as seen in Figure 2.

This protection prevents the yarn 2 from becoming soiled. The flangespacing is precisely located sov that the flange covers the package endwithout imposing excessive end pressure and without permitting anysubstantial free space between the flange and the end of the yarnpackage. The yarn package may extend'somewhat beyond the end of theflange of cap 5 provided the part extending is processed in a relativelyshort time so that no part of it becomes soiled. In general, the flangescompletely cover the ends of the yarn package; It is possible to usetapered flanges which do not contact, say, for example, the outer halfof the yarn package but which do contact the inner half of the package,the outer portion being unwound before it gets appreciably soiled. Theinner portion-must be protected. An air gap between the cap and yarn ofof an inch leads to soiled yarn. A gap of V of an inch or less may betolerated. Preferably, the ca rests on the yarn package throughout itswidth.

Other positive locking means may beemployed. For example, the core mayhave notches at its ends cooperating with a horizontal key. Internalexpandable rings and such spring means as shown in the Ramsdell patent,however, do not give satisfactory results, since there is slippage ofthe yarn and resultant abrasion. The interlocking means described inthis invention are preferred since they are positive, easily formed andinvolve no abrasion of the yarn. Contact of the flanges with the yarndoes not hinder the unwinding and materially aids in holding the yarnpackage in place during starting and stopping of the assembly.

The apparatus of this invention is highly advantageous in that thelocking arrangement between the core and the base and the core and thecap prevents the yarn package from slipping when the assembly is stoppedor started on the spindle. This is very important, for if there isskidding of the yarn relative to the base and/or cap considerablescuffing and abrading of the yarn results. Proper interlocking providedby the package adapter of this invention is essential for satisfactoryyarn quality.

With the package of this invention it has been found possible to crepetwist 1 1b. packages of -denier viscose rayon with the production ofclean, highly satisfactory yarn in every way competitive with crepe yarnmade heretofore.

The comparatively large size of the package produced in accordance withthis invention will permit a long period of twisting per spindle withoutchanging packages. In spite of the change in diameter of the packagefrom the beginning to the end of the twisting thereof, it has been foundthat the thread tension does not vary greatly and that a substantiallyuniformly twisted crepe thread is produced.

The light-weight core used in accordance with the present invention maybe of such cheap construction that it is suitable for one way ship!ment, or, if desired, the cores may be returned and reused. The partsare readily assembled and the unit is self-locking. In accordance withthe present invention a larger quantity of artificial thread can bemounted on a spindle for twisting. A relatively large package of yarncan be prepared and wound, with more perfect wind than is possible withthe use of headed spools such as previously used in the crepe twistingof artificial silk, thus greatly reducing difiiculties celluloseacetate, benzyl cellulose, glycol cellulose yarn, and the like.

Many changes and modifications may be made in the present inventionwithout departing from the nature and spirit thereof. It is therefore tobe understood that the invention is not to be limited to specific stepsand modifications above described except as set forth in the appendedclaim.

We claim:

A removable flange, self-locking uptwister package assembly comprising acylindrical core for supporting a square-ended yarn package;longitudinal lands along the full length of the inside surface of saidcore; a flanged adapter base having grooves to receive said lands at thebottom end of said core, said base having a recess to receive an end'ofsaid core which will substantially cover and substantially contact thebottom end of a supported square-endedyarn package; a cylindricalupstanding extension on said base bearing ribs, bracing and centeringsaid base in said core; on the bottom side of said base a key- Waycooperating with a driven spindle, a flanged adapter cap having groovesto receive said lands at the top end of said core, said cap having arecess to receive an end of'said core and substantially covering andsubstantially contacting the top end of said yarn package; and adownward extending cylindrical extension on said cap bearing ribs,backing and centering said cap in said core; a bore being providedthrough the aligned centers of theassembled said base, said core andsaid cap to permit mounting on said spindle.

EARL WILLIAM PAEPLOW.

MESSOUD KIACI-IIF.

References Cited in'the file of this patent UNITED STATES PATENTS NumberName Date 1,050,785 Austin et a1 Jan. 21, 1913 1,754,274 Kjellstrom Apr.15, 1930 1,879,963 Vacher Sept. 27, 1932 1,977,714 Beran Oct. 23, 19342,085,831 Schlums July 6, 1937 2,190,085 Scholl Feb. 13, 1940 2,237,837Markle Apr. 8, 1941 2,259,826 McHale Oct. 21, 1941 2,371,939 WinslowMar. 20, 1945 2,476,928 Thomas 1 July 19, 1949 FOREIGN PATENTS NumberCountry Date 8,222 Great Britain Apr. 5, 1910 8,882 Great Britain May 4,1895 540,535 Great Britain, Oct. 21, 1941

